Swamped

When it comes down to it, your main question is "what did you see".

"Besides the two humans, did you see anything you don't normally see in the desert?"

"Humans! Humans! Humans!"

Strange. It didn't give you a yes. Maybe it means it saw more than two?

"Did you see more than two humans?"

"Yes. Humans! Humans! Humans!"

"Did you see three?"

"Yes! Humans! Humans! Humans!"

The lizard seems really excited. Fortunately, Long and Marshall look distinctive enough that it's easy to confirm that two of the humans were them. The third, though... well, you try asking about Rider, and about Pubert, and just to be safe, about Rivers and Starling. You even try asking if it was a grebling. But the lizard says no each time.

What should you ask about this third human, then?